title: Nulliparity and osteoporotic fracture risk.
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D015519:Bone Density; D005260:Female; D006620:Hip Fractures / Q000150:complications / Q000453:epidemiology*; D006801:Humans; D010024:Osteoporosis / Q000150:complications / Q000453:epidemiology*; D010298:Parity; D012307:Risk Factors